Fluoride contamination of groundwater in parts of eastern India and a preliminary experimental study of fluoride adsorption by natural haematite iron ore and synthetic magnetite

Patel, Suresh C.; Khalkho, Rajiv; Patel, Subhagya K.; Sheikh, Janisar M.; Behera, Duryadhan; Prabhakar, N.

doi:10.1007/s12665-014-3112-1

Cited by 38 publications

(10 citation statements)

References 28 publications

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“…, which are greatly influenced by the cation exchange and has high alkalinity. However, weathering of rocks and leaching of fluorine-bearing minerals are the major reasons which contribute to elevated concentration of fluoride in groundwater (Patel et al 2014;Jagadeshan et al 2015). It has to be considered that the groundwater with high-fluoride concentration was significantly affected by geogenic activity.…”

Section: Resultsmentioning

confidence: 99%

Assessment of fluoride contamination in groundwater from Basara, Adilabad District, Telangana State, India

2016

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The major objective of this study was to locate the vulnerable areas in terms of fluoride contamination. A total of 34 groundwater samples were collected from major drinking water sources in rural areas of Basara, Telangana, and studied with reference to the distribution and hydrogeochemistry of fluoride. The geochemical trend of groundwater in the study area demonstrates that sodium is the dominant cation (Na ? [ Ca 2? [ Mg 2? [ K ?) and chloride is the dominant anion (Cl-[ HCO 3-[ SO 4 2-[ CO 3 2-[ NO 3-[ F-). The fluoride concentration varied from 0.06 to 4.33 (1.13 ± 0.90) mg L-1 with the highest fluoride level at Karegaon village (4.33 mg L-1). Seven locations showed the presence of fluoride in excess of permissible levels.

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Section: Resultsmentioning

confidence: 99%

Assessment of fluoride contamination in groundwater from Basara, Adilabad District, Telangana State, India

2016

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“…Fluoride (F − ) is present in rocks, soil, air, water, and plants. While low intake of F − can be beneficial for teeth in humans (preventing caries) and bone growth, excessive F − concentrations can result in fluorosis and other adverse effects on human health, such as those regarding correct mental development in children, as previously shown by Oruc ( 2008 ), Yadav et al ( 2009 ), Patel et al ( 2014 ), and Yesilnacar et al ( 2016 ). In fact, Chen et al ( 2012 ) stated that fluorosis is becoming a global toxicological concern.…”

Section: Introductionmentioning

confidence: 83%

Effects of Changing pH, Incubation Time, and As(V) Competition, on F− Retention on Soils, Natural Adsorbents, By-Products, and Waste Materials

et al. 2018

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The purpose of this work was to elucidate the repercussion of changing pH, incubation time and As(V) competition on fluoride (F−) sorption on forest and vineyard soil samples, pyritic, and granitic materials, as well as on the by-products pine sawdust, oak wood ash, mussel shell ash, fine and coarse mussel shell, and slate processing waste fines. To reach this end, the methodological approach was based on batch-type experiments. The results indicate that, for most materials, F− sorption was very high at the start, but was clearly diminished when the pH value increased. However, oak wood ash and shell ash showed high F− sorption even at alkaline pH, and pine sawdust showed low F− sorption for any pH value. Specifically, F− sorption was close to 100% for both ashes at pH < 6, and around 70% at pH 10, while for forest soil it was close to 90% at pH < 2, and around 60% at pH values near 8. Regarding the effect of incubation time on F− sorption, it was very low for both soils, pyritic material, granitic material, and both kinds of ashes, as all of them showed very rapid F− sorption from the start, with differences being lesser than 10% between sorption at 30 min and 1 month of incubation. However, sawdust and slate fines sorbed 20% of added F− in 30 min, remaining constant up to 12 h, and doubling after 30 days. And finally, mussel shell sorbed 20% at 30 min, increasing to close to 60% when incubation time was 30 days. This means that some of the materials showed a first sorption phase characterized by rapid F− sorption, and a slower sorption in a second phase. As regards the effect of the presence of As(V) on F− sorption, it was almost negligible, indicating the absence of competition for sorption sites. In view of that all, these results could aid to appropriately manage soils and by-products when focusing on F− removal, in circumstances where pH value changes, contact time vary from hours to days, and potential competition between F− and As(V) could take place.

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“…Some of the most relevant applications include (but are not limited to): magnetic recording, (photo) catalysis, pigments, ferrofluids, contrast agent for magnetic resonance imaging, drug delivery, adsorption support, anti‐tumoral agent and bioseparation . Although magnetite has been used as absorbent material for fluoride removal, and for other applications, usually it is found as part of composites . Magnetite composites have been used in biomedical applications, catalysis, removal of heavy metals, pesticides, and organic compounds, and radioactive species …”

Section: Introductionmentioning

confidence: 99%

Magnetic sugarcane bagasse composite for atrazine and fluoride removal

Helen

Blanco-Flores

López-Téllez

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: The present investigation focuses on the synthesis and application of a magnetic adsorbent material formed by the agro-industrial waste sugarcane bagasse (SCB). Its application in the removal of fluoride and atrazine demonstrates its properties as a potential adsorbent material for the treatment of contaminated wastewater. RESULTS:The synthesis method proved to be simple and reproducible. The presence and distribution of magnetite and fluoride on the surface of the material were studied by characterization techniques (SEM, EDX, FTIR-ATR). Several specific functional groups were identified which may interact with atrazine and fluoride molecules in the adsorption process. Kinetic results indicated that second-and pseudo-second-order model fitted better for the fluoride and atrazine adsorption processes, respectively. The adsorption processes took place by chemisorption onto heterogeneous surfaces. Isotherm data fitted better to the Langmuir-Freundlich model in both systems; therefore, the process took place by a combination of mechanisms. Cellulose and lignin from sugarcane bagasse contribute in the adsorption process, while magnetite not only improve performance of composite for the removal of the chemical species tested, but also achieve a simple separation process via magnetic interactions' with a common magnet. The adsorption capacities of the composites were 0.5036 mg g −1 for fluoride and 40.11 mg g −1 for atrazine. CONCLUSION: The synthesis of the magnetic composite is simple and generates a material that is easy to manipulate and isolate after the process. The affinity of the composite with atrazine is greater than with fluoride; however, the composite can be used in systems with low concentration.

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Fluoride contamination of groundwater in parts of eastern India and a preliminary experimental study of fluoride adsorption by natural haematite iron ore and synthetic magnetite

Cited by 38 publications

References 28 publications

Assessment of fluoride contamination in groundwater from Basara, Adilabad District, Telangana State, India

Assessment of fluoride contamination in groundwater from Basara, Adilabad District, Telangana State, India

Effects of Changing pH, Incubation Time, and As(V) Competition, on F− Retention on Soils, Natural Adsorbents, By-Products, and Waste Materials

Magnetic sugarcane bagasse composite for atrazine and fluoride removal

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